King Lottery Mobile App: Secure & Scalable Digital Play
Industry
Tech Stack
ABOUT THE CLIENT
King Lottery is a prominent lottery company based in India, offering a wide range of lottery games and draws to the public. Known for its credibility and transparency, King conducts various state-approved lotteries, providing individuals the opportunity to purchase tickets and participate in daily, weekly, and special jackpot draws. The company is popular for offering both traditional paper-based tickets and digital lottery options, ensuring wide accessibility across different regions
OVERVIEW
We designed and developed a mobile application for King Lottery to digitize and enhance their lottery experience. The app enables users to seamlessly purchase lottery tickets, view results, manage accounts, perform KYC verification, and make secure payments—all within a mobile-first, intuitive interface.
The solution delivers a modern, secure, and scalable platform for users while improving lottery accessibility across regions.
The result: A faster, more user-friendly lottery experience and a strong foundation for future gaming features and digital expansion.
BUSINESS
REQUIREMENT
To design and develop a mobile application that enables secure lottery ticket purchases, real-time results viewing, wallet management, and user account handling, along with a seamless user experience and future-ready gaming capabilities.
Key Features Requested
- Lottery ticket purchasing functionality
- User account management with biometric login and multi-method authentication (M-PIN, OTP, social sign-in)
- Real-time lottery result tracking and live draw links
- Wallet functionalities, including add money, withdrawal, and transaction history
- KYC verification (partial and full, including PAN integration)
- Push notifications with topic-based targeting
- Secure payment gateway integration (Cashfree)
- Static informational sections (FAQs, tutorials, rules, privacy policy, etc.)
SOLUTION
We set out to build a secure, user-friendly, and scalable mobile application for King Lottery, focused on enhancing user experience and simplifying lottery participation.
The solution was designed to include:
- Mobile-first design – Delivered a complete UI/UX tailored for lottery users, ensuring seamless navigation and intuitive flows.
- Secure authentication – Integrated biometric login, M-PIN, OTP, and social sign-ins to ensure multi-layer security.
- Wallet & KYC systems – Built wallet functionalities with add money, withdrawals, and transaction history, along with full and partial KYC compliance using PAN verification.
- Lottery features – Implemented ticket purchasing, real-time result tracking, live draw links, and push notifications with topic-based targeting.
- Payment integration – Used Cashfree Payment Gateway, with fallback to JS SDK for Android to ensure seamless production deployment.
- Agile execution – Followed an iterative sprint model with QA testing, CI/CD for iOS (TestFlight), manual Android builds, and client-assisted UAT.
The outcome is a modern, scalable mobile platform designed for secure lottery operations and future gaming expansions.
CHALLENGES
We solved key challenges in building a secure and scalable lottery application, managing payment gateway dependencies, implementing advanced push notification targeting, handling compliance requirements like KYC, and ensuring seamless user experience despite timeline changes. We ensured robust wallet operations, integrated topic-based notifications, and overcame Android production SDK limitations, resulting in uninterrupted performance and user satisfaction.
Payment Gateway integration issues with the Cashfree SDK on Android production builds
1
Topic-based push notification targeting beyond Expo Notifications’ native capability
2
KYC flows and biometric authentication implementation for compliance
3
Timeline delays due to API delivery dependencies and team size changes
4
OUR APPROACH
To build a secure, mobile-first lottery platform, we adopted an agile-inspired development strategy focused on sprint-based deliveries. The approach enabled incremental feature rollouts, close coordination with the client’s QA team, and regular integration checkpoints to maintain delivery quality.
The project execution involved comprehensive UI/UX design, modular front-end development using React Native, and robust integration with backend APIs, payment gateway, biometric authentication, and push notification services. This structured approach ensured a seamless user experience while accommodating timeline shifts due to API dependencies.
Design
Engagement Duration: Executed over a focused 3–4 month timeline with a feature-focused roadmap.
Development Strategy: Adopted an agile-inspired sprint-based approach to ensure flexibility, scalability, and seamless integration of core features.
Rollout Model: Followed iterative feature rollouts with regular integration checkpoints to validate progress and ensure smooth delivery.
Development
Service Separation: The gaming app was structured into modules for authentication, lottery ticketing, wallet management, KYC, and result tracking to ensure scalability and ease of future enhancements.
Resilient Communication: Integrated hybrid push notification architecture (Expo + Firebase Messaging) for reliable topic-based and general notifications.
Session Control: Implemented secure biometric authentication, wallet session management, and error handling for smooth user experience and uninterrupted operations.
Testing (QA)
UI & Data Sync: Implemented smooth synchronization between lottery ticket purchasing flows, wallet updates, and result tracking to ensure real-time user interactions.
Live Notifications: Integrated push notifications (Expo + Firebase Messaging) for instant lottery result updates and topic-based alerts.
Context-Aware Adjustments: Enabled biometric authentication and dynamic KYC handling, allowing secure and personalized user experiences in real time.
UAT
Payment Gateway: Integrated Cashfree Payment Gateway, ensuring secure and seamless transactions for ticket purchases and wallet operations.
Hybrid Notifications: Combined Expo Notifications and Firebase Messaging to deliver real-time alerts and topic-based targeting for specific lottery events and draws.
Wallet & KYC Flows: Built wallet management features, including add money, withdrawal, and transaction history, along with dynamic KYC flows for full and partial verification (including PAN-based compliance).
Deployment
Payment Reliability: Implemented a fallback solution using the Cashfree JS SDK for Android to ensure uninterrupted transactions even without Play Store dependency.
Push Notification Stability: Integrated hybrid notification handling (Expo + Firebase Messaging) to deliver timely and reliable lottery updates and topic-based alerts.
User Session Security: Enabled biometric authentication, wallet session control, and robust error handling to maintain secure and smooth user operations throughout the app.
PROJECT RESULTS
The King Lottery mobile application marks a significant leap in transforming the traditional lottery experience. By enabling secure online ticket purchasing, wallet operations, biometric authentication, and real-time result notifications, the solution modernizes lottery participation while ensuring compliance and user convenience.
Built on a scalable, modular architecture, it provides a strong digital foundation for future gaming expansions and enhanced user engagement.
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